Home / Shop / Yukon Gear High Performance Yukon Ring & Pinion Gear Set for Toyota Clamshell Front Axle 3.91 Ratio

Yukon Gear High Performance Yukon Ring & Pinion Gear Set for Toyota Clamshell Front Axle 3.91 Ratio

SKU: YUKYG_TLCF-391R-CS

Differential Ring and Pinion

YUK Gear Sets - Toyota...

Yukon Gear & Axle

Yukon Gear High Performance Yukon Ring & Pinion Gear Set for Toyota Clamshell Front Axle 3.91 Ratio

SKU: YUKYG_TLCF-391R-CS

Differential Ring and Pinion

YUK Gear Sets - Toyota...

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Description

Yukon Ring and Pinion sets give you the confidence of knowing you're running gears designed for the harshest of conditions. Whether it's on the street, off-road, or at the track; Yukon Ring and Pinion sets deliver unrivaled performance & quality. Yukon us

Product Overview

Yukon Gear & Axle high performance ring & pinions set the standard for quality. Yukon Engineers use state-of-the art design & testing processes, backed by 2 in-house quality labs to ensure each item manufactured meets exacting specifications & quality standards. Yukon designed gear tooth surface finish reduces both friction & heat for long races & high torque conditions. We use high grade steel in both the ring & pinion, with fitment designed to OEM specs. Go ahead, add loads of horsepower & go big on tires because Yukon offers the widest selection of gear ratios to choose from. You?ll know that your gear choice was the right one, because you chose Yukon. Yukon Ring & Pinions come with a 1 year warranty against manufacture defects. Yukon offers a Y.E.S. Plan for a lifetime, comprehensive, no-questions-asked protection plan covering your gears for as long as you own the vehicle.

Features and Benefits

10 Ring Gear Bolts

Product Details

Axle Model:	Toyota 8.0 IFS Clamshell Front SD20B
Axle Type:	Semi Float
California Proposition 65:	No
Cover Bolt Quantity:	Dropout
Description:	High performance Yukon Ring/Pinion set for Toyota Clamshell Front Axle; 3.91
Differential:	Toyota 8 IFS Clamshell Front SD20B
Gear Ratio:	3.91
Mounting Hardware Included:	No
Part Number:	yukYG TLCF-391R-CS
Pinion Spline Count:	29
Ring Gear Bolt Quantity:	10
Ring Gear Outside Diameter:	8
Shims Included:	No
Title:	Yukon high performance ring & pinion set, Toyota Clamshell, front, 3.91 ratio
WARNING CA Proposition 65 Required:	No
WARNING CA Proposition 65:	No

Application Summary

TOY 8in. REV FRNT 3.91 R/P (CLAMSHL DSGN ONLY-fits3.91/UP carrier)

Part Type

Differential Ring and Pinion

Data: v4.2 - Upd: 2026-09-30 17:51:27

Features

10 Ring Gear Bolts

Specifications

Axle Model:: Toyota 8.0 IFS Clamshell Front SD20B
Axle Type:: Semi Float
California Proposition 65:: No
Cover Bolt Quantity:: Dropout
Description:: High performance Yukon Ring/Pinion set for Toyota Clamshell Front Axle; 3.91
Differential:: Toyota 8 IFS Clamshell Front SD20B
Gear Ratio:: 3.91
Mounting Hardware Included:: No
Part Number:: yukYG TLCF-391R-CS
Pinion Spline Count:: 29
Ring Gear Bolt Quantity:: 10
Ring Gear Outside Diameter:: 8
Shims Included:: No
Title:: Yukon high performance ring & pinion set, Toyota Clamshell, front, 3.91 ratio
WARNING CA Proposition 65 Required:: No
WARNING CA Proposition 65:: No

Reference Information

Brand Name/s	Yukon Gear & Axle
StreetFX SKU	yukYG_TLCF-391R-CS
SFX Item ID	4491857
Supplier Item Code	4491857
Manufacturer SKU	YG TLCF-391R-CS
Manufacturer UPC	883584246787
Alternative References	tlcf-391r-cs, ;3.91;8;carrier;clamshl, only;fits3.91/up;frnt;r/p;rev;toy;yg;